Which mechanism reduces the required activation energy in an electrochemical fuel cell reaction involving platinum nanoparticles?

💡 Explanation

Platinum nanoparticles catalyze fuel cell reactions; due to their high surface area, reactant adsorption is improved, which weakens reactant bonds and lowers the energy barrier for the reaction. Therefore improved surface adsorption reduces activation energy, rather than conductivity, mobility, or separation, which address other performance aspects.

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